WordPress Shopping Cart Plugins

MarketPress eCommerce $19MarketPress eCommerce website from wpmudev.org
The complete WordPress eCommerce solution for selling everything from digital downloads to material goods – all the features you need with no extensions or add-ons required.
MarketPress eCommerce includes one month of unlimited upgrades, access to WPMU DEV support for this product, community & manuals. Renews monthly at $19, cancel anytime and keep the plugin/theme, no worries.

Cart66 Pro WordPress plugin Price: $98http://cart66.com/pro/pricing/
Price: $98 /Single Site or $300 /Unlimited Sites
Sell physical products, digital products, and services Easy to place products on any page, post, or custom post type
Live shipping calculations
Inventory control
Create a link that will automatically add a product to the cart and take your customer to any page of your website. You can even include a promotion that is auto-applied with the link. Post “buy now” links on Facebook or Twitter.
Live shipping rate calculations are available for:
FedEx, UPS, Australia Post, Canada Post
USPS – United States Postal Service, Local Pickup options available
– See more at: http://cart66.com/pro/features/

iThemes Exchange Pro WordPress ecommerce plugin Price: $197https://ithemes.com/exchange/pro-pack/
You can sell and deliver your content with memberships. Create as many memberships as you want with specific rules for what content your members can access. You can also use the Memberships add-on to delay (or drip) content access like in a daily, weekly or monthly course.
Create and send invoices that allow your clients to pay you directly on your website. You can add clients to reuse, automatically send invoices via email, and select the terms of the invoice.
Create variable products that let your users select from options you create. You can create select options using radio buttons, dropdowns, color values, or images. You can also manage inventory and product galleries for specific variants.

Ecwid Price: For 100 products $15 a monthhttp://www.ecwid.com/pricing website
Sell Anywhere: Any Device, Any Website, Any Location
Unlimited Storage, Unlimited Bandwidth and No Transaction Fees
Up to 10 products is free
Mobile Optimized
Add a store to any website
Sell simultaneously on multiple sites including Facebook